Tire Pressure for 2015 Winnebago Vista 27N

[Mike3393]

Tire pressure

Just got new tires(toyos) the place that put them on suggest higher pressure than Winnebago. Winne says 82, they say 100, whose is right?
This is for a 2015 vista 27n.

 

[Waterbug]

I'm no tire expert but I would go with the advice of your tire dealer. If your RV had Michilins from the factory, there is a good chance that the Toyos aren't exactly the same size. I had the Michilins replaced with Toyos, just last month and the sizes are different. They are the same diameter and load range but slightly different widths. I have a 2012 Itasca Suncruiser 37F.

 

[P and D]

Did you get RV weighed when fully loaded? Best thing is to get weighed and then based on weight inflate according to Toyo weight chart + one line higher. This way tire will wear flat and you wont get as hard of a ride

 

[wyocamper-WO]

Mine are around 85-86, but 100 would absolutely suck. The dealer had mine set to 95 and first trip was ****, bad ride and wondering all over the road. Went to the sticker 82 +5% and have been happy with that.

 

[RayIN]

The Federal Tire Placard states the minimum air pressure to safely support the maximum GVWR of each axle. There is no instance where that must be exceeded EXCEPT if the tires are not the original size.

 

[creativepart]

Is that 100psi on the Toyos a MAX psi or the psi for your weight load?

 

[powercat_ras]

I replaced my steer tires with Michelin Agilis HD Z and the tire dealer put 110 PSI into them, I was concerned this was too much so downloaded the tire inflation vs load table from Michelin and figured it out for myself.

Michelin recommended pressure vs. load is higher than the G670s, but not as high as what the tire dealer inflated them to. Table said: 3750 lb @ 85 PSI, 3925 lb @ 90 PSI. So, for these tires I am running them cold pressure between 85 and 90 PSI.

Bottom line, I'd check for yourself and not assume the tire install technician looked up the table on the tire maker's web site and matched it to the max loaded weight for your tire locations.

= = = = = = = = = =

The sticker on your 2015 Vista 27N is the Winnebago cold tire recommended pressure for Goodyear G670 14 ply tires (82 PSI). This is based on the max loaded weight specified on the sticker, and matches the Goodyear G670 tire inflation pressure table you can find and view on the Goodyear web site. Consider it the MINIMUM. Personally I like to start with a cold pressure 5 PSI higher so I don't have to add tire air to stay above the minimum as often.

The other item is making sure the difference between inner and outer rear dual cold tire pressure is never more than 5 PSI. Ideally they should be the same but 5 PSI difference is the take action difference. Personally I use Crossfire dual tire pressure balancers to keep them the same.

 

[Mike3393]

I am going to get it weighed tomorrow. Thanks for the help. Will post what I find.

 

[Ted Fyden]

https://www.toyotires.com/media/1475/rv_inflation_tables.pdf

This may help if it works.

 

[jadatis]

It would be nice, if you give maxload and referencepressure( or loadrange), of old and new tires.

Then together with the weiged loads, we can calculate the needed pressure with maximum reserve, at wich comfort and gripp still acceptable.
Dualload rear?
Speedcode of old and new?

 

[jak secret]

Im really surprised no-one has posted this, so I had better. the ONLY place you want to follow the max tire pressure is *on the tire itself*. Tires are not the same, even if they are the same size. If it tells you max pressure is 80PSI, never exceed that, as long as it still feels solid on the road. If it rides too rough with the max, you can go down , say, 15% at most from that. But on RVs, you usually want the 10 ply truck tires, and those are built to take the max pressure and really, that's where you need to be to drive safely.

 

[Tireman9]

I am going to get it weighed tomorrow. Thanks for the help. Will post what I find.

Good plan. I may be the only Tire Design and Forensic Engineer following this this thread so I am sure there are many readers who feel they know more about proper tire inflation than I do based on things they "heard" while sitting around a campfire.
Knowing the actual load on each axle when the RV is fully loaded to the heaviest you ever expect to be, is the BEST and ONLY way to start learning YOUR minimum PSI. I have a blog focused on tires in RV usage and 50 years experience with tires. You might check it out RVTireSafety.Net I will watch for your post of the scale readings for each axle. It will help if you include the complete tire size and Load Range info on your tires.

 

[vermontcc]

Im really surprised no-one has posted this, so I had better. the ONLY place you want to follow the max tire pressure is *on the tire itself*. Tires are not the same, even if they are the same size. If it tells you max pressure is 80PSI, never exceed that, as long as it still feels solid on the road. If it rides too rough with the max, you can go down , say, 15% at most from that. But on RVs, you usually want the 10 ply truck tires, and those are built to take the max pressure and really, that's where you need to be to drive safely.

Well I agree sort of. The tag next to the drivers seat has the recommended tires AND the pressure for those tires. I my case 80 PSI cold. 2012 vista 26P
I set them about 76.

 

[Tireman9]

I wonder why you are setting your tires 4 psi Low? The Certification Label you are reading is providing the PSI needed to support the GAWR. I trust you have had your rig on truck scales when the RV was fully loaded to the heaviest it will ever be and you learned your tires are all under the GAWR shown on the Certification label.

 

[Tireman9]

Info from my RVTireSafety.Net blog on "MAX"
What does 'MAX' inflation mean on tire; importance of 4-corner weights?

Here is some general information regarding what "MAX" inflation means on a tire sidewall, Hopefully, this will help clear up some readers' confusion on these topics.

Regarding "MAX" on a tire sidewall​

I do not know why people choose to focus on a single word out of the phrase "Max inflation xx psi at yy pounds load". Maybe someone can explain to me why this is so confusing to them.

Here are some facts​

Fact: Tires have a Maximum load capacity as identified by the tire company.

Fact: Load capacity is a function of and is directly related to the inflation pressure.

Fact: Increasing tire inflation will increase load capacity UP TO A POINT and no more.

Fact: Inflating a tire above the stated highest level WILL NOT result in an increase in load capacity above the stated highest level.

Fact: Unless specifically stated otherwise, discussions on tire inflation are ALWAYS talking about inflation when the tire is at AMBIENT Temperature.

Regarding 4-corner weights on RVs​

I received the following question/statement on RV trailer tire inflation:

... The (incorrect) assumption would be the total weight divided by the number of tires on each axle assembly. More often than not the tires are unequally loaded because of the way RVs are built.

 

[vermontcc]

I wonder why you are setting your tires 4 psi Low? The Certification Label you are reading is providing the PSI needed to support the GAWR. I trust you have had your rig on truck scales when the RV was fully loaded to the heaviest it will ever be and you learned your tires are all under the GAWR shown on the Certification label.

Within a few miles they read 80 to 82.

 

[vermontcc]

Been running this way for 30000 miles with no issues. Thank you for your input

 

[Tireman9]

Tire pressure in tables and on tires is ALWAYS the COLD pressure. Glad to hear that you are running a relatively light weight with your RV.

 

[jadatis]

Within a few miles they read 80 to 82.

The determined needed pressure for the load and speed, is cold pressure, and the pressure-rising by heatproduction by driving is taken into account by the tire- and car-makers.
So if you determined 80 psi to be needed, its 80 psi cold, and not warm, as you asume.

 

[Waterbug]

Anyone who determines tire pressure by how they ride is asking for trouble. If you have a heavy RV, expect the ride to be a little rough. It isn't a Cadillac. (Even though it cost more)